<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>jQuery 二级联动</title>
<script src="http://img.jb51.net/jslib/jquery/jquery.js" type="text/javascript"></script>
<script type="text/javascript">
$(document).ready(function(){
$("#province").change(function(){
$("#province option").each(function(i,o){
if($(this).attr("selected"))
{
$(".city").hide();
$(".city").eq(i).show();
}
});
});
$("#province").change();
});
</script>
</head>
<body>
<select id="province"> <option>----请选择省份---- </option><option>北京 </option><option>上海 </option><option>江苏 </option></select>
<select class="city"> <option>----请选择城市---- </option></select>
<select class="city"> <option>东城</option> <option>西城</option> <option>崇文</option> <option>宣武</option> <option>朝阳</option> </select>
<select class="city"> <option>黄浦</option> <option>卢湾</option> <option>徐汇</option> <option>长宁</option> <option>静安</option> </select>
<select class="city"> <option>南京</option> <option>镇江</option> <option>苏州</option> <option>南通</option> <option>扬州</option> </select>
</body>
</html>